6 
PACIFIC SCIENCE, VoL XII, January, 1958 
TABLE 1 
Age Sequence of Samples Containing Plant Fossils, Collected on Pagan Island 
NUMBER 
AGE AND LOCALITY* 
LITHOLOGY 
STRATIGRAPHIC RELATION 
PT-7 
Pre-caldera; Togari Peninsula. 
Well-indurated, reddish, fine- 
grained, laminated tuff. 
Tuff associated with breccia un- 
derlying thick flow and cinders 
of a minor vent; underlain by 
PC-58 
Pre-caldera; Togari Peninsula. 
Same. 
thick succession of lavas and 
pyroclastic rocks derived from 
old volcano to southeast. 
PC-79 
Pre-caldera; north end of island. 
Poorly consolidated brownish 
tuff containing numerous pel- 
lets. Some fine-grained yellow 
to reddish soil layers associated. 
Tuff overlain by pre-caldera 
lavas which are overlain in turn 
by the upper breccias. Under- 
lying tuff breccias mostly cov- 
ered by talus. 
PC-43 
Pre-caldera — base of upper brec- 
cia sequence; west coast, west 
end of caldera rim. 
Poorly consolidated brownish to 
gray tuff and cindery tuff. Local 
coarse cinder beds (Fig. 2). 
Overlain by 80-foot thick tuff- 
breccia sequence; underlain by 
8 feet of tuffs that are under- 
lain by lavas (Fig. 2). 
PC-48 
Pre-caldera — base of upper brec- 
cia sequence; west coast Vi mile 
south of monument on Ban- 
deera Peninsula. 
Same as PC-43. 
Similar to PC-43. 
PC-84 
Pre-caldera — base of upper brec- 
cia sequence; east coast, Vi mile 
NE of bisected tuff cone. 
Brownish, poorly consolidated, 
fine tuff. 
Overlain by thin pellet tuff that 
is overlain by tuff-breccia; un- 
derlain by gray ash, a yellow- 
orange soil, and lava flow. 
PC-85 
Pre-caldera — within upper brec- 
cia sequence; same locality as 
PC-84. 
Coarse, gray, poorly consolidated 
tuff with numerous large grains, 
rock fragments, and voids. 
Overlain by tuff-breccia; under- 
lain by pumice bed, 1-foot 
thick. 
ID-2 
Pre-caldera — base of upper brec- 
cia sequence; east coast, north 
side of Togari Peninsula. 
Tuff similar to PC-84. 
Overlain by thin tuffs that are 
overlain by tuff-breccias; un- 
derlain by ash, soils, and thick 
sequence of very fine tuff- 
breccia (lapilli tuff). 
ID-3 
Pre-caldera — within upper brec- 
cia sequence; specimens from 
talus blocks on slope. 
Coarse, brownish tuff. 
Near middle of tuff-breccia se- 
quence; underlain by pumice 
bed, 1-foot thick. 
PC-86 
Post-caldera — recent tuff form- 
ing surface of terrace Vi mile 
NE of bisected tuff cone. 
Brown, coarse, granular 6-inch 
tuff layer that is moderately in- 
durated at surface but loose and 
friable a few inches below. 
Overlain by pellet tuffs and 
locally by beach sands and 
wash; underlain by mixed 
loose ash and beach sand. 
* See Figure 1. 
collection less than 20 different species are 
distinguishable. Some species are represented 
by many pieces in various states of preserva- 
tion. 
In most instances the venation of the leaves 
provides the best distinguishing character. 
Margins are rarely well preserved and do not 
help much in identification. General shape, 
apparent texture, cross section, character of 
surface, and curvature are sometimes perti- 
nent. It is obvious that with such material it 
would be hopeless to attempt identification 
